SEISMIC PERFORMANCE OF RC L-SHAPED CORE STRUCTURAL WALLS
In recent years, a new type of tall buildings is being constructed. They use reinforced concrete core-walls without supplemental moment resisting frames in the seismic force resisting system. RC core-walls offer advantages of open and flexible architecture. In a core-wall building, resistance to seismic forces is provided by a reinforced concrete core. Three reinforced concrete specimens (L00A, L45A and L45B) of an L-shaped core-wall was constructed with 1/4.5 scale and statically loaded to study the effect of loading direction and the section configuration on the seismic behavior of the core-wall. L45A and L00A were the equilateral L-shaped walls, and L45B was the inequilateral L-shaped wall. L45A showed the deformation followed the Bernoullis theorem until R=+0.34%. However, after R=+0.5%, the deformation of concrete under compression progressed faster than the deformation of other region and the Bernoullis theorem was not satisfied any more at this deformation. A simple fiber model well simulated the lateral load drift angle relation if the moment curvature relation at the wall base region was properly modeled by considering pull-out of longitudinal reinforcement and local crushing of concrete. However, the analysis did not simulate the load drift angle relation after R=+0.5%. It is because that the Bernoullis theorem was not satisfied after R=+0.5% since the local crushing of the concrete took place. Hence, the numerical model based on Bernoullis theorem was stiffer after R=+0.5%.
L-shaped section core-wall axial load variation high-rise RC building
Kazuma INADA Kazuto CHOSA Hisataka SATO Susumu KONO Fumio WATANABE
Dept. of Architecture and Architectural Engineering, Kyoto University Building Construction Division of Engineering, Asanuma Corporation
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）